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Critical Drainline Carry Study Proceeds with Funding in Place

The Plumbing Efficiency Research Coalition (PERC) has secured funding for the critical second phase of its drainline carry research. With the funding secured, the coalition expects to begin work on the project in the coming months.

"Phase two of this study will address two very important aspects of drainline transport," said Pete DeMarco of IAPMO, the Research Director for the Study. "First this study will examine how a drain pipe size reduction influences drainline transport in a long building drain and the significance of that influence relative to slope, flush volume and the other system variables studied in Phase 1. Second, this project will evaluate performance at the 1.0 gpf flush volume."

"Phase 1 indicated reliable drainline transport performance in the test apparatus at the 1.28 gpf flush volume, DeMarco explained, "But a more chaotic performance was observed at the 0.8 gpf flush volume level, so it's important that we evaluate the mid-point between those two flush volumes."  

The Phase 1 report was published in November 2012. The budget for Phase 2 is $168,500 and PERC has raised this money from a broad coalition of utility and industry partners. The proposed research duration is 35 weeks and the team plans to employ 2 full time technicians for the effort.  The research is expected to be completed in mid-2015. 


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